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For those of you who are worried about "freezing" in cold weather or poor gas mileage in the winter its seems most of you are somewhat technically minded.
Here is a suggestion for you. Grab some EXTRA fittings, hose and a valve set of some sort. Make it a SWITCHABLE bypass. Then you can simply rotate the valve and flow coolant thru your TB for your "emmisions" or bypass it with the valve for the "power" setting. This would also be a much more consistant way to test if it effects MPG/POWER as the other external conditions likely would not be changing as much (IE. last month I got XX MPG, now I dont. Must be the TB coolant bypass mod.---> but its COMPLETELY different weather out, got different fuel, etc.)
If I am bored next time I have my TMIC off I will try to make this and take some pics.
I would like to see back to back dyno pulls with this switchable bypass as well